JP2658053B2 - Disk player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial application fields B. Summary of the invention C. Conventional technology D. Problems to be solved by the invention E. Means to solve the problems F. Function G. Embodiment G _1. Disc player overall structure (Figure 1, Figure 3, Figure 4) G _2. configuration of the disk tray (Figure 2) G ₃ configuration (FIG. 1, FIG. 3) of .LD drive unit G ₄ .CD for The structure of the drive unit (Fig. 1, Fig. 9, Fig. 10,
1 view) G ₅ feed mechanism (first view of .CD drive device, Fig. 9, 11
Figure) G _6. Structure of an optical pickup (FIG. 1, Fig. 9, 12
Figure, Figure 13) G _7. The optical pickup feed mechanism (Figure 1, Figure 12) G _8. Configuration (first view of one of the tray carrier, Figure 5, Figure 6) G _9. Other configuration of the tray carrier (Figure 1, Figure 6, Figure 9, Figure 20) G _10. configuration of the tray transfer body (Figure 3, Figure 6) G ₁₁ configuration of .LD chuck plate (3 Figure, Figure 6) G ₁₂ configuration of .CD chuck plate (Figure 6, Figure 9) G _13. configuration of carrier drive mechanism (Figure 1, Figure 6) G _14. differential gear arrangement ( Figure 1, Figure 5) G _15. configuration of servo member (Figure 1, Figure 9) G _16. configuration (Figure 6 of the guide member, the Figure 7, Figure 8) G _17. guide member structure of a driving mechanism (FIG. 1) G _18. operation of example (Fig. 14-Figure 25) field of the effects A. industrial H. iNVENTION the invention relates to an optical system video disc as the large-diameter disk (Hereinafter abbreviated as LD) and small diameter disc LD of the two disks of a compact disc (hereinafter abbreviated as CD) can be reproduced selectively loaded as
The present invention relates to a disc player (so-called compatible player) that is also used for / CD.

B. Summary of the Invention In the present invention, a disc tray is horizontally inserted and removed from an opening formed in a front surface of a player main body, and an LD (large-diameter disc) or a CD (small-diameter disc) is provided in the player main body. LD / CD which is conveyed to one of the driving devices for LD and CD, and which moves the optical pickup in the radial direction of the rotating disk mounted on one of the driving devices to reproduce the disk. In the dual-purpose disc player, a pair of tray carriers are provided movably in the vertical direction with respect to both side surfaces of the player main body, and mount and support the disc tray, and follow the vertical movement of the pair of tray carriers. A chuck plate for an LD and a CD for holding the LD and the CD via the chucks by the respective driving devices, and the pair of tray carriers. A carrier drive mechanism connected to the rear and moving the pair of tray carriers up and down, a differential device connected to the disc tray on the pair of tray carriers and moving the disc tray in a horizontal direction, and the optical pickup A servo member that follows the optical pickup along the curvature of the disk surface of each disk held by each of the driving devices; and a rotatable support between a pair of tray carriers in the player body. Equipped with a drive mechanism and a guide member for controlling and interlocking the differential device and the servo member, respectively, so that one guide member can control servo control such as loading of LD or CD, chuck, and skew angle of optical pickup. Can be performed.

C. Conventional technology LD / C that can selectively load two types of discs, a large-diameter optical video disc (LD) and a small-diameter compact disc (CD), into the player body for playback
2. Description of the Related Art A disc player that is also used as a D (a so-called compatible player) is known. This will be described in detail with reference to FIGS. 26 to 30.Reference numeral 200 denotes an LD / CD disc player, which can be freely inserted and removed in a horizontal direction from an opening 202 formed on the front surface of a housing-type player main body 201. A disc tray 205 for selectively transporting the LD 203 or the CD 204 into the player main body 201 provided therein; and a spindle motor (drive device) for an LD, which stands on a chassis 208 in the player main body 201 and rotates the LD 203 209 and a CD spindle motor (driving device) 210 which is provided on the chassis 208 so as to be tiltable by about 90 ° from a vertical position by a rocking mechanism including a rack, a pinion and the like (not shown) and rotates the CD 204.
And a slide guide shaft 211 provided in parallel with a predetermined height from the upper surface of the chassis 208 so as to be reciprocally movable by a drive mechanism (not shown), and the LD 203 or the CD 204
And an optical pickup 212 that moves in the radial direction and reads the information.

Incidentally, the disc tray is opened from the opening 202 of the player body 201.
When the 205 is pulled out, as shown in FIG. 26, the LD carry section 206 and the CD carry section 207 constituting the disc tray 205 can be set so as to be located on concentric circles, and are not shown. When the disc tray 205 is stored in the player main body 201 by the loading mechanism, the CD carry unit 207 is several times as large as the retracted amount of the disc tray 205 by a driving mechanism including a rack, a speed increasing gear, and the like (not shown). The relative movement is performed at the same time, and as shown in FIG. 27, the disc tray 205 is located at the rear (a predetermined CD reproduction position at the back of the player main body 201).

Then, when playing the LD203, the disc tray 2
28 is moved downward into the player main body 201 by the loading mechanism as shown by a solid line in FIG. 28, and the LD 203 mounted on the LD carry section 206 of the disc tray 205 is moved to the turntable 213 and the LD of the spindle motor 209. The information of the LD 203 is read and reproduced by the radial movement of the LD 203 of the optical pickup 212 by holding the chuck 203 at a high speed while holding the chuck (clamper) 214. In this case, the spindle motor 210 for CD is tilted, and does not hinder the movement of the optical pickup 212 in the radial direction of the LD 203.

When playing the CD 204, the disc tray 205
Is moved downward similarly to the LD 203, and the disc tray 205
The CD 204 placed on the CD carry section 207 is held and rotated by a turntable 215 of a spindle motor 210 and a chuck 216 for the CD which are vertically erected as shown in FIG. The optical pickup 212 of CD20
Read and play by moving in the radial direction of 4.

D. Problems to be Solved by the Invention However, in the conventional disk player 200, the loading and unloading of the disk tray 205, the chuck 21 for LD or CD,
Each operation such as 4,216 up / down operation is controlled separately by using a plurality of motors that are not made into one block unit.
It is difficult to control the timing of all these operations collectively,
In addition, there are disadvantages in that the number of parts is increased, the number of assembly steps is increased, and the cost is increased.

Therefore, the present invention is to provide a disc player which can solve the above problems.

E. Means for Solving the Problems The disc player of the present invention is provided with a player body having an opening formed on the front surface, and a large-diameter disc or a small-diameter disc A tray for transporting the discs into the player main body, driving devices for the large-diameter disc and the small-diameter disc provided in the player main body and rotating the discs, and the driving devices in the player main body. An optical pickup that is reciprocally movable between the discs and reads information from the discs; and a pair of trays that are provided to be movable up and down with respect to both side surfaces of the player body and that mount and support the disc trays. Carrier and a pair of tray carriers are provided so as to be able to follow up and down movements of the pair of tray carriers, and each of the driving devices is provided with a respective chuck. Chuck plates for a large-diameter disk and a small-diameter disk for holding the large-diameter disk and the small-diameter disk, a carrier driving mechanism linked to the pair of tray carriers, and for vertically moving the pair of tray carriers; A differential device connected to the disk tray on a tray carrier for moving the disk tray in a horizontal direction; and a differential device connected to the optical pickup and along a curve of a disk surface of each disk held by each drive device. A servo member for following the optical pickup; and a guide member rotatably supported between a pair of tray carriers in the player body and controlling and interlocking the carrier driving mechanism, the differential device and the servo member, respectively. I have.

F. Function Since all operations of the carrier drive mechanism, the differential device and the servo member are controlled by one guide member, the timing of each operation is hardly shifted. Further, since the differential device is controlled by the guide member, the moving distance of the disk tray when ejecting the large-diameter disk can be sufficiently obtained.

G. Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

G _1. Overall Configuration of Disc Player (FIGS. 1, 3 and 4) In FIG. 1, reference numeral 1 denotes a disc player, which is an optical video disc (LD) as a large-diameter disc and a compact as a small-diameter disc. LD / CD that can selectively load and play two types of discs (CDs)
This is a so-called compatible player for dual use.

This disc player 1 is, as shown in FIGS.
A player main body 2 having an opening 2a formed on the front surface thereof;
And a chassis 3 arranged on the bottom side of the player body 2
A drive device 20 for LD and a drive device 30 for CD, which are disposed above and rotate the LD and CD, and a drive device 30 for CD
A feed mechanism 40 for reciprocating movement toward the LD drive device 20 side, and a reciprocatingly provided between these drive devices 20 and 30;
Optical pickup 50 for reading information from D and CD discs
And a pair of trays, which are vertically movable with respect to a pair of side plates 4 and 5 erected on both sides of the player body 2 to face each other, and on which the disc tray 10 is mounted and supported. Carriers 70, 80 and a pair of tray carriers 70, 80
The disc tray 10 is mounted on at least one of the tray carriers, and the pair of tray carriers 7
A tray transfer body 90 for transporting the disc tray 10 outward from the opening 2a when the disc tray 10 is raised, and a tray transfer body 90 provided so as to be able to follow up and down movement of the pair of tray carriers 70 and 80, The LD chuck plate 100 and the CD chuck plate 110 for holding the LD and the CD via the chucks at 30 are connected to the pair of tray carriers 70 and 80. A carrier driving mechanism 120 for moving the disc tray 10 on the pair of tray carriers 70 and 80, a differential gear 130 as a differential device for moving the disc tray 10 in the horizontal direction, Connected to the pickup 50,
A skew servo member 140 serving as a servo member for causing the optical pickup 50 to follow the surface of each disk held by each of the driving devices 20 and 30 and a pair of tray carriers 70 and 80 of the chassis 3. The control cam plate 150 is rotatably supported by the opening 2a, and generally includes a control cam plate 150 as a guide member for controlling and interlocking the carrier drive mechanism 120, the differential gear 130, and the skew servo member 140 with each other. Reference numeral 8 denotes a large-diameter LD having a diameter of 30 cm.
And 9 indicates a small-diameter CD having a diameter of 12 cm.

G _2. Configuration of Disk Tray (FIG. 2) The disk tray 10 is formed of a synthetic resin into a rectangular plate shape. An annular concave large-diameter mounting portion 11 for guiding the LD is formed from substantially the center of the upper surface of the disk tray to both side edges. The large-diameter mounting portion 11 has a large-diameter concave portion 11a formed to be slightly larger than the large-diameter (30 cm in diameter) LD 8 and a medium-diameter (diameter of 2
0 cm) and a medium-diameter concave portion 11b formed to be slightly larger than the LD having a diameter of 0 cm). Notches 12, 12 for taking out the large-diameter LD 8 are formed on both ends of the large-diameter mounting portion 11.

One side of the front side of the disk tray 10 (right side in the figure)
A small-diameter mounting portion 13 for guiding a CD is formed on the corner side of the device and at a position substantially accommodated in the large-diameter mounting portion 11. The small-diameter mounting portion 13 has a small-diameter concave portion 13a formed to be slightly larger than the small-diameter (diameter 12 cm) CD9 and a minimum-diameter (8 cm diameter) CD9.
It has a minimum diameter concave portion 13b formed one size larger than that of the second concave portion 13b in a concentric and stepped shape. At the side end of the small-diameter mounting portion 13 on the side of the notch portion 12 of the large-diameter mounting portion 11 and the side end opposed thereto,
Recesses 14, 14 for taking out the small-diameter CD 9 are formed.

An oblique cutout 15 for moving the optical pickup 50 is formed from the central portion of the large-diameter mounting portion 11 to the one corner portion. When the disc tray 10 is stored in the player main body 2, the driving device for the CD is arranged along the cutout 15.
The optical pickup 30 and the optical pickup 50 are reciprocally movable. The right side of the disc tray 10 in the figure (the small-diameter
As shown in FIGS. 3 and 16, a long slide guide groove 16 is formed from the front part to the rear part on the side surface (see FIG. 3 and FIG. 16). Is formed integrally with a storage section 17 having a U-shaped cross section for storing the tray transfer body 90. A rack 18 is provided on the side of the cutout 15 inside the accommodation section 17. Further, a positioning guide hole 19 is formed on the rear left side of the disc tray 10. The guide hole 19 is adapted to be fitted into a pin 6 erected at a predetermined position on the rear portion of the chassis 3 during loading of the disc tray 10 into the player main body 2. As a result, the disc tray 10 is reliably positioned at a predetermined loading position in the player main body 2.

G _3. Configuration of LD Driving Device (FIGS. 1 and 3) The LD driving device 20 is located at a position corresponding to the center position of the large-diameter mounting portion 11 when the disk tray 10 of the chassis 3 is stored (pulled in). A spindle motor 21 that is embedded and rotates an LD such as an LD 8 at a high speed, and a turntable 23 that is integrally provided on an outer peripheral portion on an upper end side of a spindle 22 of the spindle motor 21 and mounts the LD. I have.

G _4. Configuration of CD drive (Fig. 1, Fig. 9, Fig. 10,
FIG. 1) A drive device 30 for a CD is a block-shaped unit that slides back and forth through one guide shaft 31 arranged along the rear side edge of the oblique cutout 15 of the disc tray 10 when stored. Transfer body 32 and a CD 9
A spindle motor 33 for rotating a CD, etc., and a turntable 3 fixed to a spindle 33a of the spindle motor 33 protruding from the upper surface of the transfer body 32 for mounting the CD thereon
4, a substantially T-shaped four-plate connection link 35 having one end pivotally supported by a pin at the rear of the bottom surface of the transfer body 32 and the other end pivotally supported by one end of a plate-shaped rack 41 of a feed mechanism 40 described later. It is composed of

Both ends of the guide shaft 31 are fixed to a pair of brackets 3B, 3B protruding from the chassis 3. The pair of brackets 3B, 3B
The notch 15 formed in the chassis 3 at a position corresponding to 5
It is located on both sides of the rear longitudinal side edge 3a of the opening 3A having substantially the same shape as the opening 3A. A rail 36 having a U-shaped cross section is fixed to a stroke position of the transfer body 32 on the rear side edge 3a. This rail
In the forward stroke end position of the transfer body 32 on 36,
Hook-shaped tip of adjustment plate 37 pivotally supported by pin on chassis 3
37a protrudes. In the rail 36, a roller 39 rotatably supported by a lower end of a shaft 38 vertically projecting downward at the center of the bottom surface of the transfer body 32 is inserted.

In addition, a tapered portion 32a is formed on the side surface of the transfer body 32 on the side of the tray carrier 80 at the center. In addition, this transfer body 3
2 moves back to the tray carrier 80 and retreats when the LD is reproduced.

Configuration (FIG. 1 of the feeding mechanism of G ₅ .CD drive device, Figure 9,
FIG. 11) A feed mechanism 40 for reciprocating the CD driving device 30 along the guide shaft 31 includes a rack 41 that slides on a block 3C fixed on the chassis 3 in parallel with the guide shaft 31,
A motor 42 for driving the rack 41 and the rack 41
And a speed reducer 43 that is provided between the motor 42 and reduces the driving force of the motor 42 and transmits it to the rack 41.

The rack 41 is formed in a long rectangular plate shape, and has a long hole 41a at the center thereof. The shank portions of a pair of screws 44, 44 screwed into the block 3C are fitted into the elongated holes 41a. Thus, the CD driving device 30 is pressed toward the loading position of the CD between the projecting piece 41b formed integrally with the one end of the guide shaft 31 of the rack 41 and the intermediate portion 35b of the connecting link 35. A biasing coil spring (elastic member) 45 is interposed. Further, a plurality of gear portions 41c are formed on the other side edge of the rack 41.

The reduction gear 43 includes a pair of brackets 46 fixed to a predetermined position on the chassis 3 and a worm gear 47 rotatably supported between the pair of brackets 46.
And a pinion 48 rotatably supported by the chassis 3 and having a large-diameter gear portion 48a meshing with the worm gear 47 and a small-diameter gear portion 48b meshing with the gear portion 41c of the rack 41. Thus, a belt 49 is stretched between the pulley 42a fixed to the rotating shaft of the motor 42 and the pulley 47a fixed to one end of the worm gear 47.

G _6. Configuration of optical pickup (FIG. 1, FIG. 9, FIG. 12)
(FIG. 13, FIG. 13) The optical pickup 50 is a substantially U-shaped block-shaped transfer body 51 whose one end penetrates the guide shaft 31 and slides back and forth.
And a pickup body 53 rotatably supported in a vertical direction via a support shaft 52 having a threaded portion 52a formed on one end side of the transfer body 51. A plate-like rack 54 is fixed to the upper surface on one end side of the transfer body 51 by screws 55, and a roller 57 is mounted on a side surface on the other end side via a shaft 56 projecting perpendicularly to the side surface. Is rotatably supported. The roller 57 is provided on the front side edge of the opening 3A of the chassis 3 so that the transfer body 51 and the pickup body 53 are kept horizontal.
It rolls on 3b.

On the upper surface of the pickup body 53, an objective lens 58 for irradiating and condensing the laser beam on the pits of each disk of LD and CD, and detection light for detecting the inclination of the disk surface with respect to the optical axis due to the warp or the like on the disk surface. A skew lens 59 for irradiation is provided. Also, the pickup body 53
The side of the roller 57 side has a support pin perpendicular to the side.
Protruding 60. This support pin 60 and the other end of the transfer body 51
A coil spring 61 is interposed between the coil spring 61 and 51a. Due to the tensile force of the coil spring 61, the pickup main body 53 is constantly urged to rotate upward about the support shaft 52, and maintains a horizontal state.

Note that, as shown in FIG. 12, the pickup main body 53 is formed by a roller which is formed by the elastic force of a spring washer 62 penetrating through the support shaft 52 and interposed between the transfer body 51 and the pickup main body 53.
By pressing the support shaft 52 in a predetermined direction against the elastic force of the spring washer 62, the support shaft 52 can be horizontally moved to the rack 54 side and its position can be finely adjusted. ing.

G _7. Configuration of the feed mechanism of the optical pickup (FIG. 1, FIG. 12)
(Fig.) Feed mechanism that reciprocates the optical pickup 50 between the LD drive device 20 and the CD drive device 30 along the guide shaft 31
63 is a small-diameter gear portion 64a that meshes with the rack 54 on the upper portion and a large-diameter gear portion 64b that is integrally formed with the small-diameter gear portion 64a on the lower portion.
And a pinion 64 rotatably supported by the chassis 3
A large-diameter driven pulley 65 having a small-diameter gear portion 65a meshed with a large-diameter gear portion 64b of the pinion 64 and rotatably supported by the chassis 3 at a lower portion; and a chassis on the opposite side of the pinion 64 sandwiching the pinion 64 Motor 66 having a small-diameter drive pulley 67 fixed to a shaft 66a fixed to the lower surface of the chassis 3 and projecting toward the upper surface of the chassis 3.
And a belt 68 stretched between the driving pulley 67 and the driven pulley 65 to rotate the driven pulley 65.

G _8. Configuration of One Tray Carrier (FIGS. 1, 5, and 6) A metal plate-shaped tray carrier 70 located on the left side in FIG.
Is formed in an L-shape by a bottom piece 71 and a standing piece 72 bent at a right angle.

A pair of engaging pins 73, 7 are provided on the front and rear portions of the lower surface of the bottom piece 71.
3 protrudes perpendicularly to the lower surface. The pair of engagement pins 73, 73 are formed at a predetermined position of the chassis 3 so as to vertically stand from above to below.
It is inserted into C and 3C and moves up and down. On the upper surface of the bottom piece 71, a long rail 74 having a substantially C-shaped cross section is fixed. Further, a protruding piece 71a rotatably supporting a differential gear 130, which will be described later, is formed on the inside of the front portion of the bottom piece 71 so as to protrude.

A pair of engaging pins are provided on the front and rear portions of the outer surface of the standing piece 72.
76, 77 project perpendicular to the outer surface. Also,
A pair of plate support pieces 72a,
72a is formed to protrude so as to be bent perpendicularly to the inner surface thereof and to face the inner surface. Round holes 78, 79 are formed in the pair of plate support pieces 72a, 72a, respectively.

G _9. Configuration of the other tray carrier (FIG. 1, FIG. 6, FIG. 9, FIG. 20) A metal plate-shaped tray carrier 80 located on the right side in FIG.
Are formed in an inverted L-shape by a bottom piece 81 and an upright piece 82 bent at a right angle, and are opposed to the tray carrier 70 at the same height with a predetermined interval.

A pair of engaging pins 83, 8 are provided on the front and rear portions of the lower surface of the bottom piece 81.
3 protrudes perpendicularly to the lower surface. The pair of engagement pins 83, 83 are formed at a predetermined position of the chassis 3 so as to vertically stand from above to below.
It is inserted in D and 3D and moves up and down. A synthetic resin guide 84 having a convex cross section is fixed to the upper surface of the bottom piece 81 and the inner side surface of the upright piece 82. This guide 84
A protruding portion 84a is formed in the center on the inner side surface side to protrude in the longitudinal direction. The protrusion 84a is fitted into the slide guide groove 16 of the disc tray 10, whereby the disc tray 10 slides on the upper surface of the bottom piece 81 along the protrusion 84a of the guide 84. A pair of cylindrical guide portions 84b and 84c are vertically formed integrally on the front side of the upper surface of the guide 84. Further, a chuck plate 10 for LD described later is provided on the side of the upright piece 82 at the center of the bottom piece 81 and the guide 84.
Convex edge 103 that functions as a switch operation lever of 0
Are formed to form rectangular through holes 85.

A pair of engaging pins are provided on the front and rear portions of the outer surface of the standing piece 82.
86, 87 project perpendicular to the outer surface. Also,
At the center and front of the upper end of the standing piece 82, a concave notch 82a,
82b are formed respectively. Between the cylindrical guide portions 84b and 84c on the inner surface of the standing piece 82, a CD chuck plate 110 described later is mounted, and an adjustment lever 88 for correcting a difference in thickness between the LD and the CD is rotatable upward. Pin is pivoted.
A notch 82b on the front side is provided at the distal end of the adjustment lever 88.
The engaging pin 89 placed on the rim is fixed vertically.

G _10. Configuration of Tray Transfer Body (FIGS. 3 and 6) The disc tray 10 is placed on the rail 74 fixed to the tray carrier 70 on the left side and transported outward from the opening 2 a of the player body 2. The tray transfer body 90 to be moved is stored. The tray transfer body 90 includes a flat portion 91 having a flat upper portion,
Both sides 92, 92 extending downward from both sides of the flat portion 91 are formed to have a substantially C-shaped cross section. An L-shaped bracket 93 is fixed to a front portion of the flat portion 91 of the transfer body 90, and a mounting hole 91a is formed at a rear portion thereof. The disc tray 10 is fixed to the bracket 93 and the mounting hole 91a by screws (not shown). A generally U-shaped linear bearing 95 having a plurality of steel balls 94 arranged on both sides is interposed between both sides 92, 92 of the tray transfer body 90 and both sides of the rail 74. The reciprocating movement of the tray transfer body 90 with respect to the rail 74 is performed smoothly.

G _11. Configuration of LD chuck plate (FIGS. 3 and 6) The LD chuck plate 100 is formed in a rectangular shape from a thin metal plate, and has both longitudinal side edges 101 and 102.
Is bent vertically upward, and the edge 103 on the other tray carrier 80 side is bent vertically downward and projects in a substantially convex shape. A disk-shaped chuck 104 made of synthetic resin is rotatably supported at a position corresponding to the turntable 23 of the LD driving device 20 at the center of the lower surface of the chuck plate 100. Also, engaging pins 105, 106, 1 are provided on one end of the outer surface of both side edge portions 101, 102 of the chuck plate 100 and the outer surface of the edge portion 103 on the tray carrier 80 side.
07 is protruding respectively. These two side edges 101, 102
The engagement pins 105 and 106 are fitted into a pair of round holes 78 and 79 of the one tray carrier 70 and are supported to be rotatable upward.The engagement pins 107 of the edge 103 on the tray carrier 80 side are The tray carrier 80 is placed in the center notch 82a,
It can be separated freely. This allows the chuck plate
100 is provided so as to be able to follow the vertical movement of the pair of tray carriers 70 and 80, and holds (clamps) the LD via the chuck 104 on the turntable 23 of the LD driving device 20 when the tray carrier is lowered. I have.

Further, when the pair of tray carriers 70 and 80 descend,
Edge portion 103 of chuck plate 100 on tray carrier 80 side
Of the tray carrier 80 can be inserted through the through hole 85 of the tray carrier 80. A switch 108 as a detecting means is arranged on the through hole 85 and on the bottom plate 3 'below the chassis 3. The switch 108 is connected to a microcomputer (not shown) having a controller. This microcomputer is composed of a player main body 2
Is connected to the display unit 7 provided on the front surface of the display device. Thus,
When the chuck plate 100 descends, its edge 103
When the tip 103a presses (turns on) the switch 108, it is detected that the LD clamping state between the turntable 23 of the LD driving device 20 and the chuck 104 of the chuck plate 100 is a normal state. . Also, when the chuck plate 100 is lowered and the tip 103a does not press the switch 108, the LD clamp is detected to be in a mis-chuck state, and the microcomputer displays the fact on the display unit 7. LD driving device via a controller in accordance with a command from the microcomputer.
The drive of the 20 spindle motors 21 is controlled.

G _12. Configuration of CD chuck plate (FIGS. 6 and 9) The CD chuck plate 110 is formed in the shape of a tongue by a thin metal plate, and has an arc-shaped tip on the lower surface thereof. The chuck 111 is rotatably supported. This chuck 1
Reference numeral 11 denotes a disk-shaped magnet or the like, which holds the CD between the chuck 111 and the turntable 34 of the CD driving device 30 when playing the CD.

On the lower surface of the chuck plate 110, on the tray carrier 80 side, a pair of rod-shaped support shafts 112 and 113 are vertically protruded downward. The pair of support shafts 112 and 113 are freely inserted into the pair of cylindrical guide portions 84b and 84c of the tray carrier 80 so as to be vertically movable. Thus, the chuck plate 110 is placed on the adjusting lever 88 of the tray carrier 80 during the reproduction of the CD, and the one drive shaft 112 is retracted toward the tray carrier 80 during the reproduction of the LD. The CD is mounted on the upper surface of the transfer body 32 to prevent the CD chuck plate 110 from moving downward.

Further, on the side edge of the chuck plate 110 on the side of the LD chuck plate 100, an inverted L-shaped locking projection 114 is formed by bending. The locking projection 114 is locked to a concave notch 101a formed on the side edge 101 of the chuck plate 100 of the LD. Thus, the horizontal state of the CD chuck plate 110 is maintained.

G _13. Configuration of Carrier Driving Mechanism (FIGS. 1 and 6) A carrier driving mechanism 120 for vertically moving the pair of tray carriers 70 and 80 is controlled by a cam follower 121 provided at one end (front end) side, which will be described later. First of cam plate 150
The control lever which is engaged with the cam groove 151 and is guided by a pair of support pins 122 and 123 erected at a predetermined interval on the chassis 3 so as to slide back and forth in the horizontal direction.
124, a rotating lever 126 pivotally supporting the other end (rear end) of the control lever 124, and rotatably supported on the chassis 3 via a shaft 125; A pair of slide cam levers 127 and 128 are provided on the chassis 3 so as to be reciprocally slidable in the same direction as the control lever 124 and engaged with the control lever 124 to move the pair of tray carriers 70 and 80 in the vertical direction. A coil spring (elasticity) that is locked at both ends by a locking projection 126c of the rotation lever 126 and one support pin 123 fixed to the chassis 3 to urge the pair of tray carriers 70 and 80 to move up. 129).

The control lever 124 is bent so as to have a step in the middle and is formed in a long and substantially rectangular shape, and rectangular holes 124a and 124b are formed at its front end and rear side. The support pins 122 and 123 are inserted through the holes 124a and 124b, and the control lever 124 is reciprocally slidable between the tray carrier 70 and the LD drive device 20 in the front-rear direction of the chassis 3 near the drive device 20. It is arranged.

The slide cam lever 127 located on the left side in the figure is formed in a long rectangular plate shape and stands up, and the engaging pin 127a is hung downward in a concave portion formed at the rear of the bottom surface,
Cam grooves 127b and 127d are formed in the front and rear portions of the inner surface so as to gradually rise from the front end to the rear end. The engaging pin 127a is engaged with the concave portion 126a on one end side of the rotary lever 126, and the front and rear engaging pins 76, 78 of the tray carrier 70 are engaged with the front and rear cam grooves 127b, 127d, respectively. is there. The slide cam lever 127 is mounted on the chassis 3
The upright state is restrained by the side plate 4 which is vertically fixed to the chassis 3 at one end by screws or the like, and is slidable back and forth in the front-rear direction on the chassis 3.

The slide cam lever 128 located on the right side in the figure is formed in the shape of a long rectangular plate and stands upright. The engagement pin 128a is hung downward in a concave portion formed in the rear portion of the bottom surface. Cam grooves 128b, 128c, 128d are formed in the front, middle and rear portions of the side surface so as to gradually descend from the front end to the rear end. The engaging pin 128a is engaged with the concave portion 126b on the other end of the rotary lever 126, and the front and rear cam grooves 128b, 1
28d are engaging pins 86 and 88 at the front and rear of the tray carrier 80, and the inner cam groove 128c is an engaging pin 1 of the chuck plate 100 for LD.
07 are engaged respectively. Also, slide cam lever
A cam notch 128e inclined in the same direction as the cam groove 128a and the like is formed between the front and upper cam grooves 128b and 128c of the upper portion of the 128. The engaging pin 89 of the adjusting lever 88 is engaged with the cam surface of the cam notch 128e. The slide cam lever 128 is vertically fixed to the chassis 3 at the other end of the chassis 3 with screws or the like, and is restrained in the upright state by the upright side plate 5 so as to be able to slide back and forth on the chassis 3 in the front-rear direction. It is arranged in.

G _14. Configuration of a differential gear (Figure 1, Figure 5) Vertical cylindrical differential gear 130 for reciprocating the disc tray 10 in the horizontal direction, the lower surface side of the projecting piece 71a of the tray carrier 70 A large-diameter upper pinion 131 that is rotatably supported so as to hang down and exposes a part of the gear portion to the upstanding piece 72 side of the tray carrier 70 and meshes with the rack 18 of the disc tray 10. A cylindrical body part 132 integrally formed on the lower surface side of the pinion 131 and having a concave notch 132a extending vertically on the peripheral surface, and a control cam plate 150, which will be described later, formed integrally with a lower part of the body part 132. A lower diameter pinion 133 meshes with the upper gear portion 153. A part of the body 132 of the differential gear 130 and the lower pinion 133 are accommodated in a cylindrical portion 3E formed in the chassis 3 when the tray carrier 70 is lowered.

G _15. Configuration of servo members (FIGS. 1 and 9) The optical pickup 50 follows the curve of the disk surface of each of the LD and CD discs held by each of the drive units 20 and 30 to reduce the skew angle. Skew servo member 140 to control and adjust
Is formed in a substantially T-shaped plate shape, and is supported on a pair of brackets 141, 141 fixed on the chassis 3 on both sides in the middle thereof via a shaft 142 so as to rotate vertically. The front end of the skew servo member 140 has a cam follower 143 that engages with a second cam groove 152 of the control cam section 150 described later. Also, skew servo member 1
An adjustment bar 144 is provided at the rear end of the pickup body 53 so as to abut on and separate from the support pin 60 of the pickup body 53.

G _16. Configuration of Guide Member (FIGS. 6 to 8) The control cam plate 150 for controlling and interlocking the carrier drive mechanism 120 with the differential gear 130 and the skew servo member 140 is formed in a disk shape. In addition, it is rotatably supported by a support pin 122 of the carrier drive mechanism 120. A substantially heart-shaped first cam groove 151 is formed on the inner peripheral side of the upper surface of the control cam plate 150, and an annular second cam groove 152 is formed on the outer peripheral side thereof. Further, an upper gear portion 1 is provided on an outer peripheral surface of the control cam plate 150.
53 is formed over approximately 177 °, and a lower gear portion 154 is formed at the lower portion over the entire circumference.

The first cam groove 151 includes a tray input / output groove 151a,
Carrier vertical movement groove 151b and skew adjustment groove 151c
And

G _17. Configuration of Guide Member Drive Mechanism (FIG. 1) The drive mechanism 160 that drives the control cam plate 150
A motor 162 is fixed to the chassis 3 and has a driving pulley 161 on a rotating shaft as a driving source, and a reduction gear 163 for reducing the driving force of the motor 162 and transmitting the reduced driving force to the control cam plate 160.

This reduction gear transmission 163 has a first pinion 164a having a small diameter pinion 164a that meshes with the lower gear portion 154 of the control cam plate 150.
A gear 164 and a small-diameter pinion 16 meshing with the first gear 164
A second gear 165 having 5a and a driven pulley 166 having a small diameter pinion 166a meshing with the second gear 165 are provided. A belt 167 is stretched between the driving pulley 161 and the driven pulley 166.

At a predetermined position on the bottom plate 3 'below the opening 3A of the chassis 3, an optical sensor 170 for judging whether an LD or a CD is placed on the disc tray 10 is arranged. The opening 2a opened on the front surface of the player body 2 is
It is opened and closed by 1. Further, a power switch 172, a tray open / close button 173 for an LD, a tray open / close button 174 for a CD, a play / pause button 175, a stop button 176, and the like are arranged on a front surface of the player body 2.

G _18. According operate the disc player 1 (Fig. 14-Figure 25) or more embodiments of the embodiment, when reproducing the LD8, tray open / close button for LD power switch 172 is turned ON operation When 173 is pressed, the control cam plate 150 and the differential gear 130 are rotated by the drive mechanism 160 in the direction of the arrow in the figure, as shown in FIG. This allows
As shown in FIGS. 15 and 16, the disk tray 10 is almost entirely pulled out from the opening 2a of the player main body 2 through the rack 18 of the disk tray 10 meshing with the upper pinion 131 of the differential gear 13. ).

From this ejected state, when the LD 8 is placed on the large-diameter placement unit 11 and the button 173 is pressed again, as shown in the timing charts of FIGS. 23 and 14, the control cam plate 150 is turned about 177 ° in the opposite direction. By rotating the disc tray 1
“0” is drawn into the player main body 2 and stored (loaded) as shown in FIG. When the control cam plate 150 further rotates, the differential gear 130 stops, and the control lever 124 slides backward this time.
As a result, the rotation lever 126 rotates in the direction of the arrow in FIG. 24, and the one slide cam lever 127 slides backward and the other slide cam lever 128 slides forward, whereby the pair of tray carriers 70 and 80 descend. . Along with this lowering, the disk tray 10 is lowered from the state shown in FIG. 20 to the state shown in FIG. 21, and the LD 8 placed on the disk tray 10 is turned by the turntable 23 of the driving device 20 for LD.
The chuck is chucked between the chuck 104 of the chuck plate 100 descending together with the pair of tray carriers 70 and 80.

Next, when the play / pause button 175 is pressed, the spindle motor 21 of the driving device 20 rotates at a high speed, and the optical pickup 50 moves in the radial direction of the LD 8 via the feed mechanism 63 to read the information, thereby reading the information of the LD 8. Is played. At this time, the skew servo member 140 is rotated in the vertical direction as shown in FIG. 25 by the forward and reverse rotation of the control cam plate 150 so as to follow the bending (warpage) of the LD 8 as shown in FIG. The pickup body 53 rotates vertically. As a result, the skew angle (the angle of the optical axis) of the optical pickup 50 is adjusted, and the pickup main body 53 is adjusted.
The focal point of the laser beam from the objective lens 58 with respect to the LD 8 does not expand in an elliptical shape and the image quality does not deteriorate due to crosstalk.

Thus, one control cam plate 150 can be used to load, chuck, and regenerate the LD8 optical pickup.
Since the skew angle control of 50 can be controlled, the timing of each operation is not easily shifted. Also,
The differential gear 130 is mounted on the lower gear 154 of the control cam plate 150.
By engaging the lower pinion 133, the moving stroke of the disc tray 10 can be sufficiently obtained.
Furthermore, since each mechanism can be made into one block unit centering on the control cam plate 150, the number of parts can be greatly reduced, and the number of assembling steps can be reduced and the cost can be reduced.

Also, when the CD 9 is reproduced, the disc tray 10 is ejected in the same manner as described above, but in this case, as shown in FIG. This is performed by pulling out from the second opening 2a.

In this embodiment, the skew servo member 140 for controlling the skew angle of the optical pickup 50 is engaged with the control cam plate 150. However, not only the skew servo but also servo members such as focus servo and tracking servo are engaged. Of course, it may be possible.

H. Effects of the Invention As described above, according to the present invention, a carrier driving mechanism for vertically moving a pair of tray carriers in which a chuck plate for a large-diameter disk and a chuck plate for a small-diameter disk are linked at the top, and a disk tray in a horizontal direction The differential unit to be moved and the servo member for following the optical pickup along the curvature of the disk surface are controlled by one guide member, respectively, so that each of the mechanisms and devices is integrated into one block unit. Can be As a result, the number of parts can be significantly reduced, and the number of assembly steps can be reduced. In addition, since all operations such as loading, chucking, and control of the optical pickup of each disk are controlled by one guide member, the timing of each operation is less likely to be shifted, and the reproduction characteristics of the disk are significantly improved. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view showing an internal structure of a disk player according to an embodiment of the present invention when skew servo is completed, FIG. 2 is a plan view of a disk tray, and FIG. 3 is a front view showing an internal structure of the disk player. 4 is a perspective view showing the ejected state of the CD, FIG. 5 is an exploded perspective view of the differential gear and the cam plate, FIG. 6 is an exploded perspective view of the internal structure, FIG. 7 is a plan view of the cam plate, 8 is a cross-sectional explanatory view of the cam groove of the cam plate, FIG. 9 is a perspective view of the vicinity of the CD driving device, FIG. 10 is a front view of the CD driving device, and FIG. 11 is the CD driving device and its feed. Plan view of the mechanism, FIG. 12 is a side view of the optical pickup, FIG. 13 is a front view of the optical pickup, FIG. 14 is a timing chart explanatory diagram of the cam plate, FIG. 15 is a plan view showing an ejected state of the LD, FIG. 16 is a side view showing the ejected state of the LD, and FIG. 17 is a plan view showing the ejected state of the CD. FIG. 18, FIG. 18 is a partial side view showing the retracted state of the disc tray, FIG. 19 is a partial side view showing the retracted state of the disc tray, FIG. 20 is a side view showing the retracted state of the disc tray, and FIG. FIG. 22 is a side view showing the chucking state of the LD, FIG. 22 is a plan view showing the linkage of the main parts when the disc tray is pulled out, and FIG. 23 is a plane showing the linkage of the main parts when the disc tray is stored. FIG. 24, FIG. 24 is a plan view showing the linkage of the main mechanism at the time of completion of chucking, FIG. 25 is a plan view showing the linkage of the main mechanism at the end of the skew servo, and FIG. FIG. 27 is an overall perspective view showing a conventional state of pulling out a disc tray, and FIG.
FIG. 28 is an internal schematic explanatory view showing a conventional LD chucking state, FIG. 29 is an internal schematic explanatory view showing a conventional CD chucking state, and FIG. 30 is a perspective view of each driving device of the conventional example. is there. 1 ... Disc player, 2 ... Player body, 2a ...
Opening, 8 LD (large-diameter disk), 9 CD (small-diameter disk), 10 disk tray, 11 large-diameter mounting part,
13 ... Small diameter mounting part, 15 ... Notch part, 20 ... LD drive unit, 30 ... CD drive unit, 50 ... Optical pickup, 7
0,80 …… Tray carrier, 100,110 …… Chuck plate, 104,111 …… Chuck, 120 …… Carrier drive mechanism,
130 ... differential gear, 140 ... servo member, 150 ... guide member.

Claims (1)

(57) [Claims] 1. A player main body having an opening formed in a front surface thereof; and a disk tray provided so as to be capable of being taken in and out in a horizontal direction from the opening of the player main body and conveying a large-diameter disk or a small-diameter disk into the player main body. A drive for each of a large-diameter disc and a small-diameter disc provided in the player main body for rotating the disc; and a disc drive provided in the player main body for reciprocating movement between the respective drive units. An optical pickup for reading the information of the above-mentioned information, a pair of tray carriers provided movably in the vertical direction with respect to both side surfaces of the player main body, and for mounting and supporting the disc tray; The large-diameter disk and the small-diameter disk are held by the driving devices via the chucks. Chuck plates for large-diameter discs and small-diameter discs, a carrier driving mechanism connected to the pair of tray carriers for vertically moving the pair of tray carriers, and a disc drive on the pair of tray carriers. A differential device for moving the disk tray in the horizontal direction, a servo member linked to the optical pickup, and following the optical pickup along a curve of the disk surface of each disk held by each of the driving devices, A disc player comprising: a guide member rotatably supported between a pair of tray carriers in the player main body; and a guide member for controlling and interlocking the carrier driving mechanism, a differential device, and a servo member, respectively.